const person = {
    name: "zasd",
    age: 123
}
const personProxy = new Proxy(person, {
    get(target, property) {
        return property in target ? target[property] : 'default'
    },
    set(target, property, value) {
        target[property] = value
    }
})
personProxy.age1 = 12
console.log(personProxy.age1)